1722487 has 4 divisors (see below), whose sum is σ = 1855000. Its totient is φ = 1589976.

The previous prime is 1722481. The next prime is 1722529. The reversal of 1722487 is 7842271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1722487 - 2⁷ = 1722359 is a prime.

It is a super-2 number, since 2×1722487² = 5933922930338, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66237 + ... + 66262.

It is an arithmetic number, because the mean of its divisors is an integer number (463750).

2^1722487 is an apocalyptic number.

1722487 is a deficient number, since it is larger than the sum of its proper divisors (132513).

1722487 is a wasteful number, since it uses less digits than its factorization.

1722487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132512.

The product of its digits is 6272, while the sum is 31.

The square root of 1722487 is about 1312.4355222258. The cubic root of 1722487 is about 119.8722483034.

It can be divided in two parts, 1722 and 487, that added together give a square (2209 = 47²).

The spelling of 1722487 in words is "one million, seven hundred twenty-two thousand, four hundred eighty-seven".